METAPHASE-I BOUND ARMS FREQUENCY AND GENOME ANALYSIS IN WHEAT-AEGILOPS HYBRIDS .1. AE-VARIABILIS-WHEAT AND AE-KOTSCHYI-WHEAT HYBRIDS WITH LOW AND HIGH HOMOEOLOGOUS PAIRING
METAPHASE-I BOUND ARMS FREQUENCY AND GENOME ANALYSIS IN WHEAT-AEGILOPS HYBRIDS .1. AE-VARIABILIS-WHEAT AND AE-KOTSCHYI-WHEAT HYBRIDS WITH LOW AND HIGH HOMOEOLOGOUS PAIRING
复制标题
DOI：
10.1007/bf00226261
复制
发表时间：
1991-01-01
影响因子：
5.4
通讯作者：
ORELLANA, J
中科院分区：
文献类型：
--
作者：
FERNANDEZCALVIN, B;ORELLANA, J
不同类型小麦-易变山羊草和小麦-山羊草减数分裂联合的研究。在中期I分析了具有低和高同源配对的Kotschyi杂种组合。利用C-分带技术鉴定了小麦与山羊草属植物染色体组的5种配对类型。一个基因型，似乎促进同源配对已被发现在Ae。变异变种柱竹属它的影响是在低配对的杂交种，但在高的检测。配对亲和力已分析的基础上，中期我协会在低和高同源配对的杂种，在高配对的杂种二价体和多价体。结果表明，结合臂的每种类型的可识别的协会相对于形成的总协会（相对贡献）的量没有保持，无论是在不同水平的配对（低和高）或不同的减数分裂构型（二价和多价）之间。这些研究结果似乎表明，在这种类型的杂交组合的染色体配对的数量的基础上，在中期我的基因组关系的定量必须仔细做。
Meiotic associations of different wheat-Aegilops variabilis and wheat-Ae. kotschyi hybrid combinations with low and high homoeologous pairing were analyzed at metaphase I. Five types of pairing involving wheat and Aegilops genomes were identified by using C-banding. A genotype that seems to promote homoeologous pairing has been found in Ae. variabilis var. cylindrostachys. Its effect is detectable in the low pairing hybrids but not in the high ones. Pairing affinity has been analyzed on the basis of metaphase I associations in the low and high homoeologous pairing hybrids, and in bivalents and multivalents in the high pairing hybrids. The results indicate that the amount of bound arms of each type of identifiable association relative to the total associations formed (relative contribution) was not maintained, either between the different levels of pairing (low and high) or between different meiotic configurations (bivalents and multivalents). These findings seem to indicate that quantifications of genomic relationships based on the amount of chromosome pairing at metaphase I must be carefully done in this type of hybrid combinations.